/ Dictionary / Index D decem*: Meaning and Definition of Find definitions for: de•cem Pronunciation: (de'kem Eng. des'em), [key] — adj. Latin. ten. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deceleron December Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language